Mentioned in the above biography is a story about a young man who was called to serve in the army. He went to Rav Yonasan zt”l who give him an incantation to say before he saw the doctor. When he said , the goats in the slaughter house are fatter than me (Tractate Megilla), he became a lepper, so the doctor through him out in order not to get infected. When he left and went out to the steet, it disappeared.